What are the most common complications of obesity?

Oodles, poor health. Obesity is associated with diabetes, high blood pressure, sleep apnea, infertility, premature birth, colon polyps, hiatal hernia, diverticulosis, gallbladder disease, osteoarthritis, immobility, restrictive lung disease, cardiac disease, gout, stroke, uterine fibroids, breast cysts, tumors, cancer, prostate cancer, depression, low esteem, skin rashes, premature death, multiple meds, surgery, etc.
See below. Degenerative joint disease (arthritis), back pain, inability to perform physicially, depression, decreased libido, diabetes, obstructive sleep apnea, acid reflux, and an increased risk of certain cancers just to name a few. Obesity is an extremely serious medical problem that should not be ignored!
Poor health. Obesity is associated with poor health as manifested by higher all-cause, cancer & cardiovascular mortality. In other words, you're more likely to die from any cause, from cancer, and from heart disease. Obesity is also associated with diabetes, high blood pressure & cholesterol, poor exercise tolerance, chronic pain syndrome, & depression.